CN116543714A - Electronic paper chip source electrode driving circuit and method - Google Patents

Electronic paper chip source electrode driving circuit and method Download PDF

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Publication number
CN116543714A
CN116543714A CN202310571356.XA CN202310571356A CN116543714A CN 116543714 A CN116543714 A CN 116543714A CN 202310571356 A CN202310571356 A CN 202310571356A CN 116543714 A CN116543714 A CN 116543714A
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CN
China
Prior art keywords
driving
stage
multiplexer
voltage
control
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Pending
Application number
CN202310571356.XA
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Chinese (zh)
Inventor
张庆祥
陈永俊
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Xianyue Technology Guangzhou Co ltd
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Xianyue Technology Guangzhou Co ltd
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Priority to CN202310571356.XA priority Critical patent/CN116543714A/en
Publication of CN116543714A publication Critical patent/CN116543714A/en
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
    • G09G3/344—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0297—Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The invention relates to an electronic paper chip source electrode driving circuit and a method, comprising a driving level multiplexer and a control level multiplexer, wherein the driving level multiplexer comprises a driving level input end, GND, a driving level digital signal end and a source electrode driving end, the control level multiplexer comprises a control level input end, a control level output end and a control level digital signal end, the control level output end is electrically connected with all driving level input ends, the driving level multiplexer selects whether the source electrode driving end is connected with the driving level input end or connected with the GND through the driving level digital signal end, and the control level multiplexer selects the voltage of the control level input end to be connected with the control level output end through the control level digital signal end; the invention effectively reduces the area of the electronic paper driving chip by obviously reducing the area of the chip occupied by the source electrode driving circuit, thereby greatly reducing the cost of the chip.

Description

Electronic paper chip source electrode driving circuit and method
Technical Field
The invention relates to the field of electronic paper source electrode driving chips, in particular to an electronic paper chip source electrode driving circuit and method.
Background
The electronic paper, also called digital paper, is an ultrathin and ultralight display screen, can be regarded as a thin embedded remote control display panel, has the advantages of paper, can continuously convert and refresh display contents like a common liquid crystal display, has the functions of low power consumption and folding and bending, has fine and smooth picture display and wide visual angle, is compared with other display technologies, has the greatest advantages of good visual effect in sunlight, no dead angle and much less electricity than the liquid crystal display, has the revolutionary electronic paper display technology to be applied to portable electronic books, electronic newspapers, IC cards and the like along with the development of the display technology of a series of breakthrough progress, can provide reading functions and use attributes similar to those of traditional books and periodicals.
With the rapid development of the electronic paper industry, the requirements of the electronic paper driving chip are larger, but with the development trend of the industry of resolution and multiple colors, the area of the driving chip is larger, so that the electronic paper driving chip occupies space, the cost of the driving chip is directly increased, and one main part of the electronic paper driving chip is a source electrode driving circuit. Taking a three-color electronic paper driving circuit as an example, the source driving circuit is shown in fig. 4, and the driving of each source is performed by a 2-bit controlled high-voltage multiplexer, which selects the source voltage of each source to be VSH1, VSH2, VSL or GND according to the control circuit requirement. If the color increases, the number of source voltages increases, and the multiplexer of the control circuit needs to be increased from 2-bit to 3-bit or more, resulting in a significant increase in the area of the source driving circuit.
Therefore, an electronic paper chip source driving circuit and method are provided to solve the above problems.
Disclosure of Invention
In order to make up the deficiency of the prior art and solve the key technical problems proposed in the background art, the technical scheme adopted by the invention for solving the technical problems is as follows: the electronic paper chip source electrode driving circuit comprises a driving stage multiplexer and a control stage multiplexer, wherein the driving stage multiplexer comprises a driving stage input end, GND (digital signal) and a driving stage digital signal end and a source electrode driving end, the control stage multiplexer comprises a control stage input end, a control stage output end and a control stage digital signal end, the control stage output end is electrically connected with all the driving stage input ends, the driving stage multiplexer selects whether the source electrode driving end is connected with the driving stage input end or connected with the GND through the driving stage digital signal end, and the control stage multiplexer selects the voltage of the control stage input end to be connected with the control stage output end through the control stage digital signal end.
Preferably, the control stage multiplexer is at least one stage.
Preferably, the control level multiplexer is at least one.
Preferably, the input end of the driving stage is at least one input end, and the digital signal end of the driving stage is at least 1-bit.
Preferably, the control stage output is at least one voltage output.
Preferably, the control stage input terminal is at least two voltage inputs, and the control stage digital signal terminal is at least 1-bit.
A method for driving a source electrode of an electronic paper chip comprises the following steps:
step 1: selecting a first driving voltage of the input end of the control stage through the control stage digital signal end, accessing the first driving voltage to the output end of the control stage, and transmitting the first driving voltage to the input end of the driving stage;
step 2: a driving stage multiplexer which needs the source electrode driving end to be connected to the input end of the driving stage is selectively activated through the driving stage digital signal end;
step 3: step 2, the source electrode driving end of the activated driving-stage multiplexer receives a first driving voltage to finish display;
step 4: step 1 to step 3 are repeated, the second driving voltage is selected, and the source electrode driving end of the corresponding driving stage multiplexer is connected to the second driving voltage to complete corresponding display, and similarly, the source electrode driving ends of different driving stage multiplexers can be connected to different driving voltages according to control signals to complete all the display.
Taking a three-color electronic paper driving circuit as an example:
the prior art driving mode is as follows: as shown in fig. 4, because four cases are required for controlling each display pixel point by adding the selection of GND to three colors, four voltage states of VSH1, VSH2, VSL and GND are required for controlling each display pixel point by using the prior art driving circuit, and thus the driving stage multiplexer is required to use a 2-bit multiplexer, that is, four voltage states of driving VSH1, VSH2, VSL and GND can be represented by four signals of "00", "01", "10", "11", so that the three colors and the connection to GND can be controlled. If the color increases, the number of source voltages increases, and the multiplexer of the control circuit needs to increase from 2-bit to 3-bit or more to realize more color control, resulting in a large increase in the area of the source driving circuit.
The driving mode of the invention is as follows: when the three-color electronic paper driving circuit adopts the circuit framework of the invention, as shown in fig. 2, a one-level control level multiplexer is added, in this case, all driving level multiplexers can be controlled by adding one 2-bit multiplexer, so that the situation that the 2-bit driving level multiplexer is originally needed to control 4 situations can be changed into the situation that only the 1-bit driving level multiplexer is needed to control three colors and is connected to GND.
More specifically, as shown in fig. 2, the control level input ends of the control level multiplexer are VSH1, VSH2 and VSL, so that three voltage conditions of VSH1, VSH2 and VSL at the input end VS of the control level multiplexer can be realized, and then the SEL end of the control level multiplexer is used for controlling and selecting which drive level multiplexer is activated, so that the specific driving flow of the electronic paper for driving three colors by the 1-bit drive level multiplexer can be realized by the two-level control of the control level multiplexer and the drive level multiplexer comprises the following steps:
step 1: VSH1 of the control level 2-bit multiplexer is selected through the VS_SEL end, is connected to the output end VS of the control level 2-bit multiplexer, and is transmitted to the input end of the driving level 1-bit multiplexer;
step 2: the 1-bit multiplexer which needs the source electrode driving end to be connected with the VSH1 is selectively activated through the SEL end;
step 3: step 2, the source electrode driving end of the activated driving stage 1-bit multiplexer receives VSH1 voltage to finish corresponding display;
step 4: repeating the steps 1 to 3, and connecting the source electrode driving end which needs to receive the driving voltage VSH2 to the voltage VSH2 to finish corresponding display;
step 5: and so on, the source-driving terminal that needs to receive the driving voltage VSL is connected to the voltage VSL to complete the whole display.
When more color driving needs to be controlled, as shown in fig. 3, the control level multiplexer is a multi-bit multiplexer, the driving level multiplexer is a 1-bit multiplexer, the control level input end of the multi-bit multiplexer has multiple driving voltages, and the output end VS of the multi-bit multiplexer is electrically connected with the input ends VS of all the 1-bit multiplexers. The VS_SEL end of the multi-bit multiplexer can control and select a designated voltage as an input source of the output end VS of the multi-bit multiplexer, so that the input end of the 1-bit multiplexer has various driving voltage states, and the SEL end of the 1-bit multiplexer can select whether the source driving end is connected with the input end of the 1-bit multiplexer or the GND, so that the source driving end has various driving voltages, and the control driving of various colors is realized, and the specific multi-color driving flow is as follows:
step 1: selecting a first designated voltage of the control-stage multi-bit multiplexer through a VS_SEL end, accessing the first designated voltage to an output end VS of the control-stage multi-bit multiplexer, and transmitting the first designated voltage to an input end of the drive-stage 1-bit multiplexer;
step 2: the 1-bit multiplexer which needs the source electrode driving end to be accessed to the first designated voltage is selectively activated through the SEL end;
step 3: step 2, the source electrode driving end of the activated driving stage 1-bit multiplexer receives a first designated voltage to finish corresponding display;
step 4: repeating the steps 1 to 3, and connecting the source electrode driving end which needs to receive the second driving voltage to the second driving voltage so as to complete corresponding display;
step 5: and the source electrode driving end which needs to receive the nth driving voltage is connected to the nth driving voltage so as to complete all display and realize multi-color control driving.
The invention has the beneficial effects that:
the area of the chip occupied by the source electrode driving circuit is obviously reduced, so that the area of the electronic paper driving chip is effectively reduced, and the cost of the chip is greatly reduced.
Drawings
FIG. 1 is a diagram of a source driver circuit of an electronic paper chip according to the present invention;
FIG. 2 is a diagram of a three-color electronic paper driving circuit according to the present invention;
FIG. 3 is a diagram of a multi-color electronic paper driving circuit according to the present invention;
FIG. 4 is a diagram of a prior art three-color electronic paper driving circuit architecture;
description of the embodiments
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
Examples
Three-color display driving: referring to fig. 1 and 2, an electronic paper chip source driving circuit, a control level multiplexer is a 2-bit multiplexer, the driving level multiplexer is a 1-bit multiplexer, a plurality of 1-bit multiplexers are arranged in a column, the control level input end of the 2-bit multiplexer is provided with three driving voltages of VSH1, VSH2 and VSL, and the output end VS of the 2-bit multiplexer is electrically connected with the input ends VS of all 1-bit multiplexers. VS_SEL end of the 2-bit multiplexer can control and select VSH1, VSH2 or VSL as the input source of VS of output end of the 2-bit multiplexer, and then three driving voltage states of VSH1, VSH2 and VSL are realized at the input end of the 1-bit multiplexer, and the SEL end of the 1-bit multiplexer can select whether the source driving end is connected with the input end of the 1-bit multiplexer or with GND, so that four conditions of VSH1, VSH2, VSL or GND at the source driving end are realized, and control driving of three colors and locking is realized, wherein the specific driving flow is as follows:
step 1: VSH1 of the control level 2-bit multiplexer is selected through the VS_SEL end, is connected to the output end VS of the control level 2-bit multiplexer, and is transmitted to the input end of the driving level 1-bit multiplexer;
step 2: the 1-bit multiplexer which needs the source electrode driving end to be connected with the VSH1 is selectively activated through the SEL end;
step 3: step 2, the source electrode driving end of the activated driving stage 1-bit multiplexer receives VSH1 voltage to finish corresponding display;
step 4: repeating the steps 1 to 3, and connecting the source electrode driving end which needs to receive the driving voltage VSH2 to the voltage VSH2 to finish corresponding display;
step 5: and so on, the source-driving terminal that needs to receive the driving voltage VSL is connected to the voltage VSL to complete the whole display.
Examples
Multicolor display driving: referring to fig. 1 and 3, a source driving circuit of an electronic paper chip, a control level multiplexer is a multi-bit multiplexer, the driving level multiplexer is a 1-bit multiplexer, a plurality of 1-bit multiplexers are arranged in a column, a plurality of driving voltages are arranged at the input end of the control level of the multi-bit multiplexer, and an output end VS of the multi-bit multiplexer is electrically connected with input ends VS of all the 1-bit multiplexers. The VS_SEL end of the multi-bit multiplexer can control and select a designated voltage as an input source of the output end VS of the multi-bit multiplexer, so that the input end of the 1-bit multiplexer has various driving voltage states, and the SEL end of the 1-bit multiplexer can select whether the source driving end is connected with the input end of the 1-bit multiplexer or the GND, so that the source driving end has various driving voltages, and the control driving of various colors is realized, wherein the specific driving flow is as follows:
step 1: selecting a first designated voltage of the control-stage multi-bit multiplexer through a VS_SEL end, accessing the first designated voltage to an output end VS of the control-stage multi-bit multiplexer, and transmitting the first designated voltage to an input end of the drive-stage 1-bit multiplexer;
step 2: the 1-bit multiplexer which needs the source electrode driving end to be accessed to the first designated voltage is selectively activated through the SEL end;
step 3: step 2, the source electrode driving end of the activated driving stage 1-bit multiplexer receives a first designated voltage to finish corresponding display;
step 4: repeating the steps 1 to 3, and connecting the source electrode driving end which needs to receive the second driving voltage to the second driving voltage so as to complete corresponding display;
step 5: and the source electrode driving end which needs to receive the nth driving voltage is connected to the nth driving voltage so as to complete all display and realize multi-color control driving.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. An electronic paper chip source electrode driving circuit is characterized in that: the driving stage multiplexer comprises a driving stage input end, GND, a driving stage digital signal end and a source electrode driving end, the control stage multiplexer comprises a control stage input end, a control stage output end and a control stage digital signal end, the control stage output end is electrically connected with all driving stage input ends, the driving stage multiplexer selects whether the source electrode driving end is connected with the driving stage input end or the GND through the driving stage digital signal end, and the control stage multiplexer selects the voltage of the control stage input end to be connected with the control stage output end through the control stage digital signal end.
2. The electronic paper chip source driver circuit of claim 1, wherein the control level multiplexer is at least one level.
3. The electronic paper chip source driver circuit of claim 1, wherein the control level multiplexer is at least one.
4. The electronic paper chip source driver circuit of claim 1, wherein the driver stage input is at least one input and the driver stage digital signal is at least 1-bit.
5. The electronic paper chip source driver circuit of claim 1, wherein the control stage output is at least one voltage output.
6. The electronic paper chip source driver circuit of claim 1, wherein the control level input is at least two voltage inputs and the control level digital signal is at least 1-bit.
7. The electronic paper chip source electrode driving method is characterized by comprising the following steps of:
step 1: selecting a first driving voltage of the input end of the control stage through the control stage digital signal end, accessing the first driving voltage to the output end of the control stage, and transmitting the first driving voltage to the input end of the driving stage;
step 2: a driving stage multiplexer which needs the source electrode driving end to be connected to the input end of the driving stage is selectively activated through the driving stage digital signal end;
step 3: step 2, the source electrode driving end of the activated driving-stage multiplexer receives a first driving voltage to finish corresponding display;
step 4: step 1 to step 3 are repeated, the second driving voltage is selected, and the source electrode driving end of the corresponding driving stage multiplexer is connected to the second driving voltage to complete corresponding display, and similarly, the source electrode driving ends of different driving stage multiplexers can be connected to different driving voltages according to control signals to complete all the display.
8. The electronic paper chip source driver circuit of claim 1, wherein the control level multiplexer is a 2-bit multiplexer, the driver level multiplexer is a 1-bit multiplexer, the driver level digital signal terminal is a SEL terminal, the control level digital signal terminal is a vs_sel terminal, and the control level input terminal is three driving input voltage sources of VSH1, VSH2 and VSL.
9. The electronic paper chip source electrode driving method is characterized by comprising the following steps of:
step 1: VSH1 of the control level 2-bit multiplexer is selected through the VS_SEL end, is connected to the output end VS of the control level 2-bit multiplexer, and is transmitted to the input end of the driving level 1-bit multiplexer;
step 2: the 1-bit multiplexer which needs the source electrode driving end to be connected with the VSH1 is selectively activated through the SEL end;
step 3: step 2, the source electrode driving end of the activated driving stage 1-bit multiplexer receives VSH1 voltage to finish corresponding display;
step 4: repeating the steps 1 to 3, and connecting the source electrode driving end which needs to receive the driving voltage VSH2 to the voltage VSH2 to finish corresponding display;
step 5: and so on, the source-driving terminal that needs to receive the driving voltage VSL is connected to the voltage VSL to complete the whole display.
10. The electronic paper chip source electrode driving method is characterized by comprising the following steps of:
step 1: selecting a first designated voltage of the control-stage multi-bit multiplexer through a VS_SEL end, accessing the first designated voltage to an output end VS of the control-stage multi-bit multiplexer, and transmitting the first designated voltage to an input end of the drive-stage 1-bit multiplexer;
step 2: the 1-bit multiplexer which needs the source electrode driving end to be accessed to the first designated voltage is selectively activated through the SEL end;
step 3: step 2, the source electrode driving end of the activated driving stage 1-bit multiplexer receives a first designated voltage to finish corresponding display;
step 4: repeating the steps 1 to 3, and connecting the source electrode driving end which needs to receive the second driving voltage to the second driving voltage so as to complete corresponding display;
step 5: and the source electrode driving end which needs to receive the nth driving voltage is connected to the nth driving voltage so as to complete all display and realize multi-color control driving.
CN202310571356.XA 2023-05-20 2023-05-20 Electronic paper chip source electrode driving circuit and method Pending CN116543714A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310571356.XA CN116543714A (en) 2023-05-20 2023-05-20 Electronic paper chip source electrode driving circuit and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310571356.XA CN116543714A (en) 2023-05-20 2023-05-20 Electronic paper chip source electrode driving circuit and method

Publications (1)

Publication Number Publication Date
CN116543714A true CN116543714A (en) 2023-08-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310571356.XA Pending CN116543714A (en) 2023-05-20 2023-05-20 Electronic paper chip source electrode driving circuit and method

Country Status (1)

Country Link
CN (1) CN116543714A (en)

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